fluxengine/doc/disk-acorndfs.md

Disk: Acorn DFS

Acorn DFS disks are pretty standard FM encoded IBM scheme disks, with 256-sectors and 0-based sector identifiers. There's nothing particularly special here.

DFS disks are all single-sided, but allow the other side of the disk to be used as another drive. FluxEngine supports these; read one side at a time with --heads 0 or --heads 1.

DFS comes in two varieties, 40 track and 80 track. These should both work. For 40 track you'll want --cylinders 0-79x2. Some rare disks are both at the same time. FluxEngine can read these but it requires a bit of fiddling as they have the same tracks on twice.

Reading discs

Just do:

fluxengine read acorndfs

You should end up with an acorndfs.img of the appropriate size for your disk format. This is an alias for fluxengine read ibm with preconfigured parameters.

References

• The Acord DFS disc format